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A hydrogen bonded molecular capsule versus a 3D network of tripodal organopolysilanols

26-Aug-2015 | Marina Fukawa; Takayuki Sato; Yoshio Kabe, Chemical Communication, 2015

1,3,5-Triethylbenzene based tripodal trisilanols were synthesized. The X-ray crystal structures of trisilanols showed capsule formation as well as non-capsular network formation using silanol hydrogen bonds. The 1H NMR and ESI-mass spectroscopy experiments for solution state binding supported ...

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Improvement in Mechanical Performance of Anionic Hydrogels Using Full‐Interpenetrating Polymer Network Reinforced with Graphene Oxide Nanosheets

21-Aug-2015 | MALIHE KHEIRABADI, REZA BAGHERI, KOUROSH KABIRI, DMITRI A. OSSIPOV, EFFAT JOKAR, ELHAM ASADIAN, Advances in Polymer Technology, 2015

ABSTRACT Weak mechanical possession is one of the limiting factors in application of hydrogels. To modify this inherent disadvantage, different approaches have been studied including synthesizing interpenetrating polymer network (IPN) and nanocomposite hydrogels. So, this study has focused on ...

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Materials, Vol. 8, Pages 5467-5478: Fabrication of CH3NH3PbI3/PVP Composite Fibers via Electrospinning and Deposition

21-Aug-2015 | Chao, Li-Min ; Tai, Ting-Yu ; Chen, Yueh-Ying ; Lin, Pei-Ying ; Fu, Yaw-Shyan, Materials, 2015

In our study, one-dimensional PbI2/polyvinylpyrrolidone (PVP) composition fibers have been prepared by using PbI2 and PVP as precursors dissolved in N,N-dimethylformamide via a electrospinning process. Dipping the fibers into CH3NH3I solution changed its color, indicating the formation of ...

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Electrochemical Synthesis of Binary and Ternary Niobium-Containing Oxide Electrodes Using the p-Benzoquinone/Hydroquinone Redox Couple

21-Aug-2015 | Christopher M. Papa; Anthony J. Cesnik; Taylor C. Evans; Kyoung-Shin Choi, Langmuir, 2015

New electrochemical synthesis methods have been developed to obtain layered potassium niobates, KNb3O8 and K4Nb6O17, and perovskite-type KNbO3 as film-type electrodes. The electrodes were synthesized from aqueous solutions using the redox chemistry of p-benzoquinone and hydroquinone to change the ...

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Low Temperature Colloidal Synthesis of Silicon Nanorods from Isotetrasilane, Neopentasilane, and Cyclohexasilane

20-Aug-2015 | Xiaotang Lu; Kenneth J. Anderson; Philip Boudjouk; Brian A. Korgel, Chemistry of Materials, 2015

Isotetrasilane, neopentasilane, and cyclohexasilane were studied as reactants for silicon (Si) nanorod growth in solution. These polysilane hydrides were found to enable lower growth temperatures in solution than any other silane reactants used to date. Cyclohexasilane enabled the lowest growth ...

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The Mechanism of Iron(II)-Catalyzed Asymmetric Mukaiyama Aldol Reaction in Aqueous Media: Density Functional Theory and Artificial Force-Induced Reaction Study

20-Aug-2015 | W. M. C. Sameera; Miho Hatanaka; Taku Kitanosono; Shu̅ Kobayashi; Keiji Morokuma, Journal of the American Chemical Society, 2015

Density functional theory (DFT), combined with the artificial force-induced reaction (AFIR) method, is used to establish the mechanism of the aqueous Mukaiyama aldol reactions catalyzed by a chiral Fe(II) complex. On the bases of the calculations, we identified several thermodynamically stable ...

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Alkali - Metal Ion Coordination in Uranyl(VI) Poly-Peroxo Complexes in Solution, Inorganic Analogues to Crown-Ethers. Part 2. Complex Formation in the Tetramethyl Ammonium-, Li+ -, Na+ - and K+ – Uranyl(VI) – Peroxide – Carbonate Systems.

19-Aug-2015 | Ingmar Grenthe; pier Luigi zanonato; Plinio Di Bernardo; Valerie Vallet; Zoltan Szabo, Dalton Transactions, 2015

The constitution and equilibrium constants of ternary uranyl(VI) peroxide carbonate complexes [(UO2)p(O2)q(CO3)r]2(p-q-r) have been determined at 0 oC in 0.50 M MNO3, M = Li, K, and TMA (tetramethyl ammonium), ionic media using potentiometric and spectrophotometric data; 17O NMR data were used to ...

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Reactivity of Phosphanylphosphinidene Complex of Tungsten(VI) toward Phosphines: A New Method of Synthesis of catena-Polyphosphorus Ligands

19-Aug-2015 | Rafał Grubba; Anna Ordyszewska; Kinga Kaniewska; Łukasz Ponikiewski; Jarosław Chojnacki; Dietrich Gudat; Jerzy Pikies, Inorganic Chemistry, 2015

The reactivity of an anionic phosphanylphosphinidene complex of tungsten(VI), [(2,6-i-Pr2C6H3N)2(Cl)W(η2-t-Bu2P═P)]Li·3DME toward PMe3, halogenophosphines, and iodine was investigated. Reaction of the starting complex with Me3P led to formation of a new neutral phosphanylphosphinidene complex, ...

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Development of Porous Alginate Microbeads Containing Silver Nanoparticles and Their Antibacterial Efficacy

18-Aug-2015 | M. R. EL‐AASSAR, XIUMEI MO, Advances in Polymer Technology, 2015

ABSTRACT The main aim of this study is to develop a new method to prepare porous microbeads. Silver nanoparticles (AgNPs) were synthesized in an alginate colloidal solution, and then the porous microbeads containing AgNPs were prepared. The prepared alginate/AgNPs microbeads were ∼300 μm in ...

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Visible‐Light‐Driven Oxidation of Organic Substrates with Dioxygen Mediated by a [Ru(bpy)3]2+/Laccase System

18-Aug-2015 | Ludovic Schneider, Yasmina Mekmouche, Pierre Rousselot‐Pailley, A. Jalila Simaan, Viviane Robert, Marius Réglier, Al ..., ChemSusChem, 2015

Abstract Oxidation reactions are highly important chemical transformations that still require harsh reaction conditions and stoichiometric amounts of chemical oxidants that are often toxic. To circumvent these issues, olefins oxidation is achieved in mild conditions upon irradiation of an ...

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